<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>选项卡</title>
<link rel="stylesheet" href="css/style.css" />
</head>
<body>
	<div id="box">
		<input type="button" value="HTML" />
		<input type="button" value="JS" />
		<input type="button" value="JQ" />
		<input type="button" value="PHP" />
	 
		<div><p>HTML</p></div>
		<div><p>JS</p></div>
		<div><p>JQ</p></div>
		<div><p>PHP</p></div>
    </div>
<script>

</script> 
<script type="text/javascript" src="js/js.js"></script> 
</body>
</html>